One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(9,10)(11,13)(12,14)(15,16)(17,18)(19,29)(20,26)(21,27)(22,24)(23,28)(25,32)(30,38)(31,43)(33,37)(34,41)(35,42)(36,40)(39,46)(44,47)(45,48)(1,3,4,8)(2,5,6,7)(9,11,12,15)(10,13,14,16)(18,24)(19,30)(20,33)(21,23)(25,38)(29,40)(31,45)(32,36)(39,48)(41,42)(43,47)(44,46)(10,14)(13,16)(17,19,22,32)(18,25,24,29)(20,31,33,46)(21,30,23,36)(26,39,37,43)(27,40,28,38)(34,45,35,44)(41,47,42,48)(2,6)(3,8)(10,14)(13,16)(17,20)(18,26)(19,31)(21,35)(22,33)(23,34)(24,37)(25,39)(27,42)(28,41)(29,43)(30,44)(32,46)(36,45)(38,47)(40,48) involution — undirected(17,21,22,23)(18,27,24,28)(19,30,32,36)(20,34,33,35)(25,40,29,38)(26,41,37,42)(31,45,46,44)(39,47,43,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.